Water-grate for steam-boilers.



4No. 675,153. Patented` may 28, |901.-

A.. Y. FRY?` l WATER 'GRTE FR "STEM B01-LEES.

(Application med MM'. 14, 1901.) (No Model.) 2 Sheath-Sheet 2.

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UNITED STATES PATENT 5EETCE.

ALBERT Y. FRY, OE CHARLEROI, PENNSYLVANIA.

WATER-G RATE FOR STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent N o. 675,153, dated May 28,1901.

Application filed March 14, 1901. Serial No. 51,089. (No model.)

To all whom it may 0070.062071..-

Beit known that I, ALBERT Y. FRY, a citizen of the United States ofAmerica, residing at Charleroi, in the county of Washington and State ofPennsylvania, have invented certain new and useful Improvements inWater- Grates for Steam-Boilers, of which the following is aspecification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in hollowgrate-bars for furnaces, and has for its object to connect thegrate-bars to a source of water-supply and cause the water in itspassage to the boiler to circulate through the grate-bars before beingdischarged into the boiler, thus heating the water previous to itsdischarge into the boiler and also protecting the grate-bars bypreventing them from being burned out.

Briefly described, the invention consists of a series of parallel hollowgrate-bars suitably supported, with their ends connected and incommunication in a manner to form a continuous iiue from the end of theone outside grate-bar to the corresponding end of the oppositegrate-bar, the end of the one outside grate-bar being in communicationwith the water-supply and the corresponding end of the opposite outsidegrate-bar being in communication with the boiler. Connection is alsomade with the steam dome or other suitable source of steam-supply,whereby steam may be admitted to blow out any dirt or sediment that mayaccumulate in the gratebars or connections, and all of these features,together with others entering into my invention, will be hereinaftermore specifically described and then particularly pointed out in' theclaims.

In describing the invention in detail reference is had to theaccompanying drawings, forminga partof this specification, and Whereinlike numerals of reference indicate similar parts throughout theseveralviews of the drawings, in which- Figure 1 is a perspective view of aboiler, partly broken away at the side of the boilersetting to show myimproved grate-bars arranged in position in the boiler-furnace. Fig. 2is a top plan view of the grate-bars, showing by arrows the course ofthe water through said bars. Fig. 3 is a vertical cross-sectional viewtaken on the line 3 3 of Fig. 3. Fig; 4 is a longitudinal sectional viewof a part of one of the bars. Fig. 5 is a transverse vertical sectionalviewthrough a part of the bars to show the communication between one barand the adjacent bar at the ends. Fig. 6-is a top plan view of the same.

Referring to the drawings by reference-numerals, 1 indicates thegrate-bars, as many of which are employed as may be required, accordingto the size of the furnace in which they are to be used. Thesegrate-bars are hollow throughout their length, with the exception, ofcourse, that the ends thereof are closed, and they are provided on thesides at each end with bushings which abut against each other, so as tospace the bars apart, as shown in the drawings. Near each end these barsare provided with openings which eX- tend vertically through the barsand receive hollow connecting-bolts 2, by means of which the grate-barsare secured in position upon the supporting-bars 3. The su pporting-bars3 extend some distance beyond the grate-bars, so as to engage with thefurnace-wall and form a support, and they are provided with enlargementsor bushings et, which have U- shaped passage ways 5. The bolts 2 arethreaded into the necks of these bushings, and these bolts are providedwith openings 6, which may be arranged spil-ally therein, as shown, orthese openings may be arranged in vertical rows or circumferentially ofthe bolts, as will be readily apparent. The heads of the bolts seat uponwashers 7, arranged between said heads and the grate-bars, so as to forma perfectly tight joint and prevent leakage. It will be observed thatthe U-shaped openings at each end of the bars communicate, theinlet-port with one grate-bar and the outletport with the correspondingend of the adjacent bar.

rIhe one outside bar is connected at the forward end of the furnace bypipe 8 to the water-supply pipe 9, this supply-pipe connecting with thepump (not shown) or other suitable source of supply. Connected to thepipe 8 by pipe l0 is an injector 11, which is fed with steam from thedome through pipe l2. Placed in the pipe 8, between the grate-bars andthe connection of pipe lO, is a check-valve lll, which permits the Waterto flow to the IOO grate-bars, but prevents backiiow of the same. Acheck-valve 15 is also placed in the line 9, this line also having asuitable valve 1G, (such as the ordinary globe-valve.) A valve 17 (suchas a globe-valve) is placed in the line 10 between the injector' and thepipe S, and a checkvalve 1S may be placed in this line 10 close to theline S. The corresponding end of the opposite outside bar is connectedby a pipe or line 19 to the boiler 20, which line carries a suitablevalve 2l, (such as a globe-valve.)

A drain or blow-off cock 22 is connected 'tov the line 8, as shown inFig. 1.

I preferably arrange the openings G in a spiral manner in the bolts 2,as this may be done without weakening the bolts, as would be the case ifthe openings were placed inline and in close relation to each other.

In operation, the valve 16 being open, the water flows through line 9,through line 8, into the one outside grate-bar at the forward end of thefurnace, through this grate-bar, as indicated by the arrow in Fig. 2,and at the rear end of the grate-bar is discharged through hollow bolt 2and U-shaped passage-way 5 into the rear end of the adjacent ornextgratebar, back toward the front of the furnace through this grate-bar,as indicated by arrow in Fig. 2,and discharged through the U -shapedpassage-way into the succeeding grate-bar, and soon throughout theseries of bars until it is discharged into the line 19 and from thenceto the boiler. The grate-bars being thus filled with water, this wateris heated previous to its discharge into the boiler, while the bars areprevented from becoming overheated.

The grate-bars may be readily drained of dirt or sediment by closing thevalve 1G and opening valve 17, so as to admit steam from the domethrough pipe 10. These connections rnay be varied,however,from thatshown herein, and they have been illustrated mainly to sho'w thegrate-bars in operative position, and in the construction of the bars inaccordance with my invention it will be observed that various changesmay be made in the details thereof without departing from the generalspirit of the invention.

IIaving fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

with the openings in the grate-bars, and hollow bolts connecting thegrate-bars to the supporting-bars and establishing communication betweensaid grate-bars and supporting-bars, substantially as described.

In furnace-gratos, a pair of supportingbars having U -shapedpassage-ways, a series of hollow grate-bars supported on saidsupporting-bars, hollow bolts connecting the grate-bars to thesupporting-bars, said hollow bolts registering with the U-shapedpassage- Ways and provided with openings in their walls which registerwith the chambers in the grate-bars, substantially as described.

4. In furnace-grates, a series of hollow grate-bars closed at theirends, and supporting-bars having passage-ways communicating with thehollow grate-bars, said passage-ways being so arranged that the waterwhen received at one end of one outside grate-bar must pass through allthe succeeding gratebars and be discharged at the corresponding end ofthe opposite outside grate-bars.

5. In furnace grates, a series of hollow grate-bars closed at theirends, supportingbars having passage-ways, and hollow bolts connectingthe grate-bars with the passageways of the supporting-bars, saidpassageways being so arranged that the water received at one end of abar is discharged therefrom at its opposite end into the correspondingend of the adjacent grate-bar, substantially as described.

In testimony whereof I affix my signature in the presence of twowitnesses.

ALBERT Y. FRY. lVitnesses:

.Toi-1N NOLAND, E. E. POTTER.

